Siphon exhaust for drier rolls



April 3, 1934. a H. YOUNG 1,953,525

SIPHON EXHAUST FOR DRIER ROLLS Filed June 13. 193i 2 Sheets-Sheet 1April 3, 1934.

G. H. YOUNG SIPHON EXHAUST FOR DRIER ROLLS Filed June 15. 1931 2Sheets-Sheet 2 Patented Apr. 3, 1934 UNITED STATES PATENT OFFICE SIPHONEXHAUST R DRIER, ROLLS George Harold Young, Dayton, Ohio ApplicationJune 13, 1931, Serial No. 544,247

11 Claims.

Such drier rolls comprisecylindrical drums rotating upon hollowtrunnions through which" 'live steam is introduced into the interior ofthe roll for heating purposes and through which the spent steam isexhausted while the roll continuesto rotate. I

The drying action is efiected by :transference of heat of the live steamwithin the shell of the cylindrical drier roll to the sheetor Web heldin contact with the external surface of the roll 2 with resultingevaporation of -moisture therefrom. The speed of operation and quantityproduction are directly dependent upon the rapidity of heattransference; The sheet coming from the presses is cold and wet andrapidly condenses the steam within the roll. 7

.Water, air and oil being'poor conductors of' heat interfere seriouslywith the drier action when a film of oil, water and sludge collects uponthe inner surface of the roll. Likewise a stratum of air interposedbetween the steam body and the wall of the roll acts as a heat insulatormaterially reducing its efliciency. The formation of air pockets-causesuneven distribution of steam and the sheet-dries unevenly. Thereforewhen 3 the drier -;roll' contains water or is air bound, there resultsa'loss of production, greater steam consumption and a varying andinferior quality of paper.

The elimination of air and water of condensation from the interior ofthe rolls has been a constant'and troublesome problem, which is com-'plicated by the fact that the steam must be used economically. I

I The object of the present invention is to 1m- 5 ,prove theconstruction as well as the means and mode of operation of siphon tubesfor drier rolls whereby they will not only be cheap and econom-v ical inproduction. but will be more efiicient in use. capable of being readilyand easily inserted 0 and removed, adjustable while injuse', of greaterdurability and unlikely to get out of repair.

A primary object of the invention is to provide means for the constantand complete re-' moval of water of condensation and air from the drierroll whereby there will occur no airinsulation of the drying surface andno absorption of heat from the steam by water accumulation therebyinsuring the action of live steam only in active circulation effectivelyheating the 'drier surface.

A further object of the invention is to effect rapidand'continuo'uscirculation of live steam through the roll with constantremoval of condensate and air, thereby insuring steady pressure and evendrying at uniform temperature with maximum efficiency and capacity.

A further object of the invention is to provide a siphon tube which maybe readily adjusted from the exterior of 'the roll in its relation withthe interior wall thereof while the roll is in motion.

A further object of the invention is toprovide a siphon tube and methodof mounting the same which will impose a minimum strain upon the steamjoint of the hollow trunnion.

A further object of the-invention is' to provide means for fixedlymaintaining the intake end of the siphon in proper location and inconstant relation with 'the drier wall and to prevent whipping andswaying or displacement thereof.

A further object of the invention is to effect suitable bracing of thesiphon tube 'within the roll.

A further object of the invention is to effect maximum results with asiphon tube of minimum length.

A further object of the invention is to pro-' vide means forfacilitating the insertion and removal .of the siphon tube and toprovide a flexible tube, and means for supportingit in alined positionduring insertion and removal.

A further object of the inventionis'to provide an improved form ofmounting for the siphon tube and an anti-friction steam joint betweensuch mounting and the roll trunnion.

With the above primary and other incidental objects in viewas will morefully appear in the specification, the invention consists of thefeatures of construction, the parts and combination thereof, and themode of operation, or their equivalents, as set forth and described inthe. claims. v

Referring to the accompanying drawings wherein are shown the preferred,but obviously not the only forms of embodiment of the invention, Fig. 1is a sectionalview of a portion of a-drier roll to which the siphon tubeand its mounting, forming the present invention, has been applied. Fig.2 is an enlarged sectional view 'of the anti-friction steam joint forthe drier roll which forms the mounting for the siphon tube.

Fig. 3 is a sectional view of the drier roll illustrating a modificationof the siphon tube wherein the adjusting means is omitted. Fig. 4 is anenlarged detail view of the construction shown in Fig. 2 andillustrating an ordinary form of friction ring steam joint. Figs. 5 and6 illustrate modifications of the construction shown in the precedingfigures.

Like parts are indicated by similar characters of reference throughoutthe several views.

It has been common practice in drier roll construction to employ a rigidsiphon'tube which is necessarily of relatively slight curvature in along radius because of the restricted opening through the hollowtrunnion through which the tube must be inserted. In such case the tubeeither does not approach sufliciently closely to the wall of the drum tokeep the quantity of condensate to minimum or it is so long and heavy asto impose such great cantilever strain on the steam joint as to ,causeexcessive wear and leakage. Frequently such tubes'sag until they rubupon the interior of the hollow trunnion until worn through and a leakdevelops destroying their-era naust action. Also such tubes sag untilthey drag and rub upon the wall of the drier roll increasing thefriction and causingexcessive wear. The ordinary siphon tube isinaccessible for observation and adjustment while in operation,therefore such conditions are frequentlyundiscovered unhollow drierroll, the head of which is provided.

with a hollow trunnion 2 to rotate in suitable bearings (not shown)under influence of the drive gear 3 carried by the trunnion. The hollowtrunnion 2- communicates at its extremity with a. manifold 4 with whichit is connected by a steam tight joint which permits relative rotationof the trunnion and drum without loss of steam. The manifold 4 comprisesa steam supply chamber 5 communicating directly with the hollow trunnion.2 and therethrough with the interior of the roll 1. Live steam issupplied to the chamber,5 and thence to the roll through the steamsupply conduitfi which, due, to use of the antifriction type of steamjoint illustrated in Figs. 1 and 2 may preferably be of flexiblecharacter. The manifold 4 contains a second chamber 7 which is anexhaust chamber communicating with the interior of the roll through asiphon tube which extends through the hollow trunnion 2 of the roll. Adrain conduit 8- leads from the exhaust chamber 7 of themanifold.

The live steam admitted to the cylinder may carry with it-air anduncondensable gases and when exhaust steam from the engine is employed.such steam may carry more or less. oi. particles which accumulatingwithin the roll form a heat insulating film upon the walls thereof. Thesteam by contact heats the walls of the roll over the exterior of whichtravels the cold and wet web of paper or other material to be dried. Asthe steam cools by-contact with the roll walls the water of condensationcollects in the bottom of the roll. This water as well as theuncondensable gases and air must be removed to insure uniform and rapidcirculation of live steam. Such is the purpose of the siphon tube.

In the present instance the siphon tube comprises an initial section 9extending axially through the hollow trunnion 2 and a dependent intakeportion 10 suspended within the roll 1 and connnected with the primarysection 9 by an intermediate flexible section 11 which preferably,though not necessarily, comprises a portion of commercial woven metallichose. The dependent intake portion 10 of the siphon tube is furtherinterconnected with the primary section 9 by an inclined brace 12,pivotally connected at 13 with the intake section 10 and likewisepivotally connected to a sliding collar 14 upon the initial section 9.This sliding collar 14 is interconnected by a retractile spring 15 witha stationarily supported collar 16. In the form of embodimentillustrated in Figs. 1 and-2 the second collar 16 is rigidly connectedby tie rods 17 with a head 18 having bayonet slot connections 19 with ahub or hollow boss 20 projecting from the manifold 4 and through whichthe initial section 9 of the siphon tube extends into the exhaustchamber 7 thereof. Obviously other forms of connection may be providedbetween the head 19 and the projecting guide boss 20. The siphon tubesection '9 is preferably capable of both rotary and reciprocatory motionwithin the guide boss 20. The

' outer end of the tube section 9 is provided with lateral drain ports21 for discharge of the condensate and air or gases into the manifoldchamber 7 from which they are drained through the conduit 8. Theextremity of the tube is connected with an operating lever 24 by astem22 ex tending through a suitable packing gland 23. This hand lever- 24is pivoted at 25 to a link 26 which in turn is pivoted to a support 27rotatively mounted exteriorly of the packing gland. By means of thelever 24 the tube may be both rotated and given a to and froreciprocatory motion. The

spring 15 yieldingly resists any inward movement of the sliding sleeveor collar 14. Normally the coils of the spring 15 are contractedsubstantially into contact with each other and the spring thus forms asubstantially rigid abutment which resists outward motion of the slidingcollar 14. By a thrust motion transmitted to the tube section 9 by thehand lever 24, whereby the tube section is slidingly adjusted inwardlythrough the guide boss 20 and through the collars l6 and 14, the latterbeing free upon the tube but held stationary by'the rods 17, the intakesection 10 of the tube is oscillated about the pivotal connection 13with the brace member 12. The brace member. is held substantiallystationary during such adjustment by the collars 14 and 16 and spring15.

. The swinging adjustment of the intake section is screw 9a or otherlocking device.

By giving to the tube a half rotation by rotation of the manifold head4, the brace 12 can be turned to the top of the tube, whereupon theweight of the intake section 10 will exert a pulling strain upon thebrace member 12 against the contractile tension of the spring 15,thereby drawing the sliding collar 14 away from the collar 16 and exatending the spring 15 until the several sections 9. l0 and 11 of thesiphon tube assume an alined relation as shown by dotted lines in Fig.1, in which position the further descent of the intake section 10 willbe limited by the engagement of the brace member 12 with the respectivesections 9 and 10. In such alined relation, the siphon tube is veryeasily inserted and removed through the trunnion 2.

In association with this form of siphon tube there is preferably. thoughnot necessarily employed an anti-friction type of steam joint illustrated in Figs. 1 and 2. In this construction the end of the hollow rolltrunnion 2 is provided with a fixedly attached extension 36 havingthereabout inner races 3'7 for a double series of reversely inclinedbearing rollers 38 enclosed within a bearing housing 28 fixedly securedto the manifold 4 and having therein exterior roller races 29.Interposed between the bearing housing 28 and the manifold 4 is aflexible gasket 30 extending inwardly into overlapping relation with acarbon or graphite bearing ring 31 secured to the rotating extension 36of the trunnion. The gasket 30 is held tightlyagainst the bearing ring31 by steam pressure. Suitable packing grooves 32 are provided betweenthe bearing housing-and the rotating part.

I This construction relieves the manifold of frictional strains ortorsion and thereby permits the use of flexible steam supply and drainconduits 6 and 8.

While the capability for adjustment of the siphon tube while the roll isin operation is quite desirable, the flexibility of .the tube andsupport of the intake portion against whipping" or drag upon" the rollwall may be achieved as shown in Figs. 3 and 4. In such modifiedconstruction the initial section 9 is fixedly mounted in the. dividingwall between the steam supply chamber 5 and the exhaust chamber 7. ofthe manifold 4. The siphon tube comprises the same sections 9 and 10interconnected by the fiexible intermediate section 11 as before. Thesliding collar 14 is connected with the intake section 10 by the bracemember 12 pivoted at 13 to the intake section. The same retractilespring 15 interconnects the sliding collar 14 and the collar .16 whichin this instance is fixedly secured upon the tube section 9. The degreeof drooping or relative relation of the intake end of the section lOandthe wall of the roll is predetermined by the position of the collar 16upon the tube section 9 which is fixedly secured thereon prior to theinsertion of the tube through the hollow trunnion. By changing theposition of the fixed collar 16 outwardly upon the tube section 9, theintake portion 10 may be made to droop lower or more closely approachthe roll wall. Conversely by securing the collar 16 in an inwardposition the intake portion will be supported by the brace 12 .atgreater elevation and hence farther removed from theroll wall. It willbe understood that the droop or descent of the intake portion 10 andresulting retractive movement of the sliding collar 14 is resisted bythe contacting coils of the spring 15 which form an abutment or limitingstop. just as they do in the formerly described construction. When it isdesired to remove or insert the siphon tube. the tube is given a halfrotation. which brings the brace member on top of the tube and the tubestraightens out under influence of gravity and against the tensirable.It may be entirely omitted as shown in Fig. 5 wherein the sliding collar14, to which is pivotally connected the brace 12,- abuts directlyagainst the fixed collar 16 when the tube is in'operative position. Thecollar 16 may be secured in different positions thereby varying theangular relation of the intake portion 10 with the horizontal portion 9.Upon reversal of the tube the collar 14 will slide upon the section 9s'ufliciently to enable the tube sections to assume an alined relationas before.

In Figs. 3 and 4. an ordinary form of friction steam joint isillustrated wherein a friction ring 33 is interposed between themanifold 4 and the extension member 36 upon the end of the hollowtrunnion 2. The manifold 4 is connected by bolts 34 with .a clamp ring35 surrounding the extension 25 of the hollow trunnion. therebymaintaining a steam tight revoluble bearing between the manifold and thetrunnion. This type of siphon ,tube can be introduced through longbearing journals having small openings wherein a common bent pipe.cannot be installed. Theintake end of the tube will automaticallyassume and maintain the same relative position regardless of how manytimes it maybe removed and returned.

During the rotation of the drier roll. due to friction. the puddle oraccumulation of water through condensation is carried slightlyforwardlyand upwardly so that the water accumulation does not assume a.position exactly at the bottom v the intake section 10 of the siphon 2to be adjusted rotatively to such extent as to reach the "greatestaccumulation of water which may be slightly above the extreme bottom ofthe roll. Thus by a to and fro adjustment of the hand lever 24 in onedirection the intake section 10 is adjusted toward and from the wall ofthe roll, while by a transverse oscillatory movement of ,the lever 24}the intake section may be swung to and fro in a path substantiallyparallel with the wall of the roll to enable its adjustment to the pointof greatest accumulation. of condensate. I j

.In order to remove and replace the siphon tube,

it is necessary to disconnect the manifold head 4.

- the entire manifold head may be readily turned to a" reverse positionas shown by dotted lines in Fig. 1. whereby a half rotation of thesiphon tube is effected thus turning the brace 12 to theupper side ofthe tube and the tube tends to straighten by gravity until limited bythe brace 12 as'is shown by dot and dash lines in Fig. 1.

In Fig. 5 there is shown a modification wherein the spring 15 has beenomitted and a stop collar 16a is fixedly secured upon the tube section 9to serve as an abutment for the sliding collar 14 to which the bracemember "12. is pivoted. The weight of the intake section 10 issufficient to cause such intake section 10 to descend until limsection 9to vary the range of descent or drooping movement permitted the intakesection 10. Upon half rotation of the tube!) the respective sections 9and 10 assume an alined relation as shown by 6 dot and dash lines inwhich position they are supported by the brace member positioned abovethe tube section by the partial rotationj In Fig. 6 there is shown aconstruction which is substantially a-reversal of that illustrated inpreceding flgures wherein the brace member 12 is fixedly pivoted to thecollar 14X secured upon the tube section 9 and is pivoted to a" slidingcollar 13X uponthe intake section 10 of the tube. This collar 13x abutsat one side upon a fixed stop trary to the spring 15 which. under suchconditions, is extended under pulling tension.

From the above description it will be apparent that there is thusprovided a device of the character described possessing the particularfeatures of advantage before enumerated as desirable, but whichobviously is susceptible of modification in its form, proportions,detail construction and arrangement of parts without departing from theprinciple involved or-sacrificing any of its ad-* vantages. While inorder to comply with the statute the invention has been described inlanguage more or less specific as to structural features, it'is to beunderstood that the invention is not limited to the specific featuresshown, but that the means and construction herein disclosed'comprise thepreferred form of several modes of putting the invention into effect andthe invention is therefore claimed in any of its forms'or modificationswithin the legitimate and valid scope of the appended claims.

Having thus described my invention, I claim: 1. The combination with ahollow drier roll orthe like. having a hollow trunnion, of a conduitextending through the hollow trunnion including a flexible portionwithin the roll and resilient means for limiting the flexing action ofthe conduit.

2. The combination with a hollow drier roll or the like having a hollowtrunnion, of a conduit extending through the hollow trunnion into theinterior of the roll, a flexible joint in said conduit whereby theportion within the roll may be turned to angularly disposed relationwith the portion extending through the trunnion, anda spring fordeflecting the portion of the conduit within-the roll out of alinementwith the portion thereof extending through the trunnion.

3. The combination with a hollow drier roll or the like, having a hollowtrunnion, of a conduit extending through the hollow trunnion into theinterior of the roll, a flexible joint in said conduit whereby theportion within the roll may be turned to angularly disposed -relationwith the portion extending through the trunnion, a spring for deflectingthe flexibly connected portionof the conduit within the roll andsupport-- ing means for holding the flexibly connected portions of theconduit substantially in alinement during insertion and removal of theconduit through the hollow trunnion.

4. An exhaust conduit for a drier roll having a hollow trunnion,including two flexibly interconnected sections one of which extendsthrough the trunnion, and a brace member having flexible connection withoneof said sections and sliding engagement with the other section atopposite sides of their flexible interconnection.

5. An exhaust conduit for a drier roll having a hollow trunnion, saidconduit including two flexibly interconnected portions, a brace memberattached to one portion and having sliding engagement with'the othersection and a distantly operated actuator extending through saidtrunnion for actuating one portion so as to slidingly adjust the bracemember to vary the relation of the other flexibly connected portion.

6. A conduit, including two flexibly intercom nected portions, a bracemember attached to one portion and having sliding engagement with theother portion, a helical spring surrounding the last mentioned portionand fixedly attached thereto at one end and attached to the slidingportion of the brace member at its other end. said spring yieldinglyresisting the sliding adjustment'of the brace member as the relation.eratively connected with the brace member through. one of said portionsfor varying the relative adjustment of the conduit portions.

8. A conduit for a. drier roll including two flexibly interconnectedportions, an adjustable brace member operatively connected with bothportions thereof across their flexible intercomnection for limiting therelative angular adjustment thereof, an adjusting member for said brace,and a spring interconnecting the brace and adjusting member against theyielding resistance of which the brace is adjustable in unison withrelative movement of the conduit portions independently of saidadjusting member.

9. A conduit for a drier roll having a hollow trunnion, including twoflexibly interconnected portions one of which extends through thetrunnion, a supporting member for limiting the range of relativeadjustment of said flexibly interconnected portions and an adjustingmechanism including one of said portions for varying the range ofrelative adjustment of the conduit portions to which the portions arelimited by the supporting member, said adjusting mechanism including acontrol lever located outside of the roll.

scribed. the combination with a hollow drier roll or the like having ahollow trunnion. a conduit extending through the hollow trunnion intothe roll including two .flexibly interconnected sections, one of whichdroops within the roll, and an adjustingv member actuating the sectionextending through the conduit by which the drooping member'may be swungin a plane substantially parallel with the axis of the roll while thelatter is in motion.

10. In a construction of the character desuspended within the roll. therelative angular relation of the rigid sections being adjusted byactuating the section extending through the hollow trunnion.

GEORGE HAROLD YOUNG.

